Spot lamp



June 5, 1945. e. E. GRAVENSTINE SPOTLAMP Filed Sept. 23, 1945 I A In which :encloses and Patented June 5, 19 45 George ElGrarenstina Dafid gmrpto 'TheS. H. Thomson Manufacturing Company,

, Applicationlseptember 2 ports therefor. t

ltaisztherprincipal object" of the: invention to providesai'tdetachablesupport,particularlyadaptediiornremovably mounting: anelementnsuelrla za spotlamp', which: is capable of firmly and reliably supporting such element: notwithstanding severe jolting: and vibration.

b It isaalsot an object t provide aspotlampvhavin'g a. supporting structure which makes Jitpossible: quickly and easily to .detach= and. replace the lightoma supporting member; and which holds the light firmly when in {place assuring: against the loosening and falling is 1subjecteziltorvsevere jolting .annvibration. nIt is .alsotanmobject to" provide "a adapted: to beisupported oma 'vehicletwhere it is held securelytiniplaoe .dmfing all 'normal :svehicle operation, rand from which: it; can. berrea'di'ly detachednwithoutstheuse. of tools'and without involvingrthe possible lossoftanyr parts .of the: supporting; structure, for the separate use. of r the light: :alsaai portable device-when desired.

1 Other s oba' ectsa andsadvantagess will". be appar ent from zthew followingt description, "the accompanning drawing; and. .theappended claims.

:LIn thezdrawingzi i .Fig. Lissa sidetielevational viewroftasspotlamp assemblyvconstructedu in: accordaneerwitlr the present invention; t i i Fig 2; is a: view of the stem. member carried by .the ili'ght itself, this view beineonl a :larger scalerthan; Fig. l and; shown partially inls section; Fig. 3 is a broken viewxpattiallynineelevation and partially in 'sectionshowing the :mounting bracket of the light: in its assembled. :relation upon-the supporting socket; and l i i t Fig. :4 is a viewl partiallyin elevationzanclpartially' in section: showing the swiveled mounting for the socket.

Referring; to; the" drawing ferred' embodiment-tot the invention a .frame Ill is provided which; may be generally rectangular inform and which. is 'adaptedto be secureclin any suitablev Way to the vehicle or. other body with whichthe lamp israssociated. In the case of i-a lamp for use; with a truck, tor example, the: frame which discloses a pre- ID is suitably secured to the truck body -int-a con-,

'venient locationsuchiasat the rear thereof where thealamp assembly will: be: flprotectediagainst possibleidamage. t

Within the frame I is a disk she-peel, housing rotatably supports ;-a 'spring'reelzonwhich the extension cord 12 is wound;- Anelectrica'l connection. is madethrough "thereof: even it though; it

:spotlamp -55 is securedFaXbracketI-Ml,r thelower-end of which will); and {comprises 1a." bracket wires t3: a suitableipowen source'such astthe tnuckrbattery;thetwiresextending into a suitable fittihgyl koarried vonflthe'"hub of the-casing. E'Electhreat-connection; ismade from wires 1 3- through rumiirrg' 'contacts rwithinz the hub? to the cor'dnr I2 oarriedl on the treeltmorder thatthe spotlamp may :bev. continuously energized throughout the winding 'axidunwindinglot' the reel.

.6026,: I22 leads to; theispotlamp which: isnshown at 11 Hi, i being :lil lustrated. as comprising a A hanc lle :grlpi portion v I1 into the end'cof: "which: the cord t2; extendsea. trigger: control switch: taibeingipm- "vi'd'ed inmonvenientposition for operation bythe finger; :of the 'handl holding grip Fl. 7 "The lamp embodies the. reflector housing a1 9 and" the? lens case ZOLithe remainingiparts of the lamp strucitures'being; of suitablesconstructionaasdesired. 5A9?!- upperfhookgportiorr 2-2 isiuprovided forrsupporting the lamp from: above whenrenrovedalfrom its'snptporteasshownb carrieclwbytiranne 2-5 permanently secured-to the trainer-and having an: upward lt extendingi shankriportiom Z6 throughrwhich there sextendsffreelyithe boltafl. -Spring zarno-rm-a lly acts between" the top of the shank and the: head mofxtheibolt; :am'd' is under suitable tensiontozfric- .tionallyfrestrainzthea movement of the bolt to} any .settposition while at the same time "permitting rotation thereof by the user twlrien it issdesi'red 1301 rotate :thelamp about a- Vertical axis. Atfits upper: :end the :bolt .is' :formed with; a: tongue: l3!) The support for: the; lamp is which is received betweenhthe'zends tof therbie .iurcatedzportion 2310f a socketumember 33; A

w ng nutrfl extending throughr the overlapping tparts providesi for tightening theparts; upon each other to retain thelwsamer at any adjusted anew la-r Lposi-tion and uponloosening,:provideswtor :moyement; .of thensocket to any desired angular relation lwithxrespect to the support. The: struc'r-s .ture asi provldedwthuscomprises .a swiveledz supforx socket-33 making it v universally adjust.- a e; l

aperture 36w isiormed through: one :wall of the-socket 33 at an intermediate i point Y therein, and ,on: the opposite wall. of; .lthezsocket a: thumb screw T315115 mounted; :being threa'd'edly land fadijustablyreeeived within the-annularusookettwall.

:Breferably thehinne'r end'of thethumbscrewois -.errlarged :-so :thattwhile i it: can The: screwed outwardly to e, position: where: the; inner endl is close wto-theqlnner wall of -the socket, it-t cannot be fullytwithdnawmzandi hence eannotbeulost.

To -the. lower side "of the lamp casing l Si -there aperture .thumb screw 3'! in relation to the flattened face aperture in the socket, and

surfaced and free of threads, a firm and secure this manner, the lamp may stem within socket 33 is provided with a stem member 4| extending downwardly therefrom. The stem is formed with an internal recess 42 extending substantially transversely of the axis of the stem, the recess having one portion of relatively large diameter and another portion of smaller diameter, the two portions being coaxially arranged. One side face of the stem is chamfered as shown at 43, forming a flattened surface. at a slight angle to the vertical as illustrated in Fig. 2.

Within recess 42 pin 45 having a smooth surfaced end portion adapted to be projected through the small end of the recess. The pin also is formed integrally with an enlarged head portion46 which is received within the larger part of the recess, the adjacent side wall of the stem above the chamfered part being peaned over as shown at 41 in order to retain the head within the lateral extent of the stem. An expansion spring 48 is received with v in the larger part of the recess and engages under the head 46 to normally urge the pin into the position shown in Fig. 2 where the head is retained against the peaned portion'41-and the locking end 45 is received inwardly of the stem.

Fig. 3 shows the stem portion assembled in the socket, with the pin 45 being aligned with 36. The inwardly projecting end of 43 of the stem forms in effect an interlocking connection, permitting assembly only when ,the parts are in proper alignment. Upon the tightening of thumb screw 31 the end of that screw engages the head 46 of the locking pin, to move the same axially against the force of spring 48, thereby projecting the end 45 beyond the stem and into aperture 36 in the socket. The end 45 of the locking pin is made to fit closely within the because it is smooth locking engagement is thereby secured. v Further, it will be seen that there is a continuing force developed by spring 48 acting against the end of thumb screw 31, this force being such that even under continual jolting and'vibration such as encountered when the light is mounted upon a moving truck, a tight connection is maintained, and the thumb screw is effectively held against any tendency to work loose. When supported in be turned'in'any desired direction and directed at any desired vertical angle by means of the swiveled supporting structure as described.

I When, however, it is desired to removethe lamp from its support and to use it as a portable device, it is only necessary to loosen thumb screw 37, whereupon spring 48 effects the retraction of the locking pin from the socket to a clearance position within the confines of the stem, and the lamp may be then directly removed without the necessity of effecting any separation or disassembly of any parts of the mechanism. Also, when so separated, all parts of the lamp assembly are firmly and securely held together in their own relationship, and hence there is no possibility of any loss of the parts of the mechanism taking place. The lamp may b then removed to the extent permitted by the length of cord l2 on the reel, on the reel and it is only necessary to replace the in proper alignment as clearly shown and determined by the relation of the flattened face 43 and thumb screw 31. Thereafter the tightening of thumb screw 31 will lock the parts securely in assembled relation.

and upon return 'thecord is rewound' there is positioned a locking v to the spotlamp, a stem projecting from said of, a headed While the form of apparatus herein described constitutes a preferred embodiment of the invention, it is to be understood that the invention is not limited to this precise form of apparatus, and that changes may be made therein without departing from the scope of the invention which is defined in the appended claims.

What is claimed is:

1. A support of the character described for detachably supporting a spotlamp or the like which comprises a bracket adapted to be secured bracket having a transversely extending recess therein, a pin received within said recess and having an end portion adapted to be projected through the stem, means for normally retaining said end portion within the stem, a tubular socket member for receiving said stem internally thereof, and an adjustable member carried by said socket and engageable with said pin to project the end beyond the .stem and through an aperture in the socket.

2.A spotlamp assembly of the character described comprising a bracket for attachment to the spotlamp, a stem projecting from said'bracket and having a recess extending transversely therepin received within said recess, means for confining the head of said pin against movement outwardly beyond the outer surface of said stem, resilient means within said recess for engaging said head to normally retract the opposite end of said pin within said stem, said resilient means being yieldable upon application of pressure to the headed end of said pin to proj t said opposite end thereof beyond the stem, a tubular socket .member having an aperture in its side wall in position to receive the end of said pin, and an adjustable member carried by said socket opposite said opening to engage the headed end of said pin to project th same into said aperture in locking relation with said socket.

3. A spotlamp assembly comprising a supp rting bracket having a stem projecting therefrom, said stem having a recess extending transversely thereof, a locking pin within said recess and normally located inwardly of said stem, a tubular socket adapted to receive said stem in interfitting engagement, said socket having an aperture in the Wall thereof opposite said pin in the assembled relation of said parts, means carried by said socket for engaging said pin to project the'same into said aperture in looking relation with said 7 socket, and means for yieldably restoring said pin to its said normal position. fl. A detachable support for spotlamps and the like comprising a supporting bracket having a stem projecting therefrom, said'stem having a recess extending transversely thereof, asm'ooth surfaced locking pin within said recess and normally located inwardly of said stem, a tubular socket adapted to receive said stem in [interfitting engagement, said socket having an aperture in the wall thereof opposite said pin in the assembled relation of said parts, and a manually operable member threadedly mounted in a wall of said socket for engaging said pin to project the same into said aperture in locking relation with said socket.

5. A detachable support for spotlamps and the like comprising a supporting bracket having a stem projecting therefrom, said stem having a recess extending transversely thereof, a' headed locking pin within said recess, resilient means acting-against the head of said pin for normally withdrawing the end of said pin inwardly ofthe surface of said stem, a tubular socket adapted to receive said stem in interfitting engagement, said socket having an aperture therein opposite said pin in the assembled relation of said parts, and means carried by said socket for engaging the headed end of said pin to project the opposite end: thereof to said aperture in looking relation with said socket, said resilient means effecting withdrawal of said pin from said aperture upon withdrawal of said engaging means.

6. A detachable support for spotlamps and the like comprising a supporting bracket having, a

stem projecting therefrom, said stem having a recess extending transversely thereof, a headed locking pin within said recess, resilient means acting against the head of said pin for normally withdrawing the end of said pin inwardly of the surface of saidstem, means on said stem for preventing said head from projecting outwardly of the wall of said stem, a tubular socket adapted to receive said stem in interfitting engagement, said socket having an aperture therein opposite said pin in the assembled relation of said parts, v

and means carried by said socket for engaging the chamfered to provide aflattened surface extending in a direction inclined to the axis of said stem, a lockin pin within said recess, the wall of said stem adjacent said chamfered portion being peened over to retain said pin within said 7 recess and within the periphery of said stem, a

tubular socket adapted to receive saidstem in interfitting engagement, said socket having an aperture therein opposite said pin in the assembled relation of said parts, and a thumb screw threadedly mounted in the wall of said socket opposite said aperture and adapted to ena e id P t p ject the same fromsaid stem into said aperture, in looking relation with said socket. l l

8. A detachable support for spotlamps' and the like comprising a supporting bracket having a stem projecting therefrom, said stem having a recess extending transversely thereof, the side wall of said stein adjacent said recess being chamfered to provide a flattened surface extending in a direction inclined to the axis of said stem, a smooth surfaced locking pin within said recess,

the wall of saidstem adjacent said chamfered portion being peened over to retain said pin within said recess and within the periphery of said stem, a tubular socket adapted to receive said stem in interfitting engagement, said socket having an aperture therein opposite said pin in the assembled relation of said parts, a thumb screw threadedly mounted in the wall of said socket opposite said aperture and adapted to engage said pin to project the same from said stem into said aperture in locking relation with said socket, andyield-able means for normally urging said pin into withdrawn relation within said recess and developing a continuing pressure against said thumb screw to retain the same against loosening during jolting and vibration.

GEORGE E. GRAVENSTINE. 

